On November 29, 2011, we entered into Amendment No. 1 (the Amendment) to our $800 million Amended and Restated Credit Agreement (the Credit Agreement) with Citicorp USA,
Inc., as Administrative Agent, and various other financial institutions.

As set forth in the Amendment, outstanding revolving loans made under the Credit Agreement accrue interest during the initial six-month period after the effectiveness of the Amendment at the rate of
either (i) a base rate plus a margin of 1.25% or (ii) LIBOR plus a margin of 2.25% per annum. Thereafter, outstanding revolving loans made under the Credit Agreement accrue interest at a base rate plus a margin ranging from 1.00% to
1.50% or LIBOR plus a margin ranging from 2.00% to 2.50% per annum as set forth in a grid based on available credit. The unused commitment fee will be payable on the undrawn portion of the credit facility during the initial six-month period
after the effectiveness of the Amendment at the rate of 0.438% per annum. Thereafter, the unused commitment fee will range from 0.375% to 0.50% per annum as set forth in a pricing grid based on available credit.

The foregoing description of the Amendment is a summary and is qualified in its entirety by the terms and provisions of the Amendment
filed as an exhibit to this report, the terms of which are incorporated herein by reference.

Certain of the lenders party to
the Credit Agreement and the Administrative Agent, as well as certain of their affiliates, have performed, and may in the future perform, for Tenet and its subsidiaries, various commercial banking, investment banking, underwriting and other
financial advisory services, for which they have received and may in the future receive customary fees and expenses.

2

Item 2.03

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information set forth in Item 1.01 of this report is incorporated into this Item 2.03 by reference.

Item 9.01.

Financial Statements and Exhibits.

d)
Exhibits.

Exhibit

No.

Description

10.1

Amendment No. 1, dated as of November 29, 2011, to that certain Amended and Restated Credit Agreement, dated as of October 19, 2010, among the Registrant, Citicorp USA, Inc., as
administrative agent, and the financial institutions named therein.

3

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

TENET HEALTHCARE CORPORATION

By:

/s/ Gary Ruff

Gary Ruff

Senior Vice President and General Counsel

Date: December 1, 2011

4

EXHIBIT INDEX

Exhibit

No.

Description

10.1

Amendment No. 1, dated as of November 29, 2011, to that certain Amended and Restated Credit Agreement, dated as of October 19, 2010, among the Registrant, Citicorp USA, Inc., as
administrative agent, and the financial institutions named therein.

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